Genesis 18:8-10

New Revised Standard Version Catholic Edition

⁸ Then he took curds and milk and the calf that he had prepared, and set it before them; and he stood by them under the tree while they ate.

⁹ They said to him, “Where is your wife Sarah?” And he said, “There, in the tent.” ¹⁰ Then one said, “I will surely return to you in due season, and your wife Sarah shall have a son.” And Sarah was listening at the tent entrance behind him.